| guanin | <physiology> A crystalline substance (C5H5N5O) contained in guano. It is also a constituent of the liver, pancreas, and other glands in mammals. Source: Websters Dictionary (01 Mar 1998) |
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| guanine | <biochemistry, molecular biology> One of the constituent bases of nucleic acids, nucleosides and nucleotides. (18 Nov 1997) |
| guanine aminase | <enzyme> An enzyme that catalyses the deamination of guanine to form xanthine. Chemical name: Guanine aminohydrolase Registry number: EC 3.5.4.3 (12 Dec 1998) |
| guanine cell | A cell whose cytoplasm contains glistening crystals of guanine. (05 Mar 2000) |
| guanine deaminase | <enzyme> An enzyme that catalyses the deamination of guanine to form xanthine. Chemical name: Guanine aminohydrolase Registry number: EC 3.5.4.3 (12 Dec 1998) |
| guanine deoxyribonucleotide | Deoxyguanosine monophosphate, a hydrolysis product of DNA. Synonym: guanine deoxyribonucleotide. (05 Mar 2000) |
| guanine ribonucleotide | A major component of ribonucleic acids. Synonym: guanine ribonucleotide, guanosine 5'-monophosphate. Guanylic acid reductase (GMP reductase), an enzyme that catalyses the reaction of GMP with NADPH producing IMP, NH3, and NADP+; a part of the purine salvage pathway. Guanylic acid synthetase (GMP synthetase), an enzyme catalyzing the reaction of l-glutamine, XMP, and ATP to produce GMP, l-glutamate, AMP, and pyrophosphate; a key step in purine biosynthesis. Acronym: GMP (05 Mar 2000) |